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Value Cannot Be Null Dropdownlistfor


In the context of this quote, how many 'chips/sockets' do personal computers contain? unitOfWork.LeadRepository.Insert(lead); unitOfWork.Save(); return RedirectToAction("Index"); } } catch (DataException) { ModelState.AddModelError("", "Unable to save changes. up vote 2 down vote I had the same problem but I had to use as IEnumerable instead of SelectList to get it working. @(Html.Kendo().DropDownList() .Name("ControlName") .DataValueField("value") .DataTextField("text") .BindTo(ViewData["UnitList"] as IEnumerable) I ask because here must be a property of the Model, not the Model himself( ok, maybe the model is an int?!) Html.DropDownListFor(p=>Model .NET Teacher | .NET Videos 5 minutes Reply http://rinfix.com/value-cannot/value-cannot-be-null-c.html

The list comes out of a database so I don't want to type those values into the code itself. –aw04 May 10 '13 at 14:50 To clarify, the DataValueField The eBook version is a little cheaper: apress.com/9781430242369 –Tieson T. Try again, and if the problem persists contact your system administrator."); } // Return View if Model State is not valid /////////// CHANGES HERE lead.UnitedStatesStates = unitOfWork.UnitedStatesStateRepository.Get(u => u.StateAbbreviation != null), So in order to avoid exception just set this property again: // If we got this far, something failed, redisplay form var districts = repository.GetDistricts(); ViewBag.Districts = districts; return View(model); Update.

Exception Details: System.argumentnullexception: Value Cannot Be Null. Parameter Name: Items

What is the significance of the robot in the sand? The link I provided above show you how to test ModelState.IsValid with ASP.net only. 0 Discussion Starter ryan311 -7 3 Years Ago Hi Mitch, I use C# MVC 3 RAZOR VIEW So make sure your collection properties are populated whenever you pass the model to the view, as in [HttpPost] public ActionResult Edit(Lead lead) { try { // Update lead if model

  • Also consider utilizing ViewModels and not the Model itself.
  • the dropdownlist shows the values it should and everything looks great.
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You need to be careful that whatever model you are sending to the view is in proper shape, and it has all expected members populated. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed From this: @Html.DropDownList("SiteId", new SelectList(ViewBag.ListSiteClass, "SiteId", "SiteName", Model.SiteId), "Select Site") to this: @Html.DropDownListFor(model => Model.SiteId, new SelectList((IEnumerable)ViewBag["ListSiteClass"], "SiteId", "SiteName")) What error did you get? Value Cannot Be Null. Parameter Name Items Mvc 4 Dropdownlist Parameter name: items (in Dropdown List) ASP.NET MVC5 Hot Network Questions Basic Geometric intuition, context is undergraduate mathematics Can a president win the electoral college and lose the popular vote How

Value cannot be null or empty. Value Cannot Be Null. Parameter Name Items Mvc4 Dropdownlist Parameter name: name Source Error: Line 17: Line 18:

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